Eliana Pecorari, Ca Foscari
Ing. Antonio Ferrari, ACTV
Giovanni Giuponi, ACTV
Human activities in urban areas strongly affect air quality. In order to characterize the impact of the main air pollutants sources, emission inventories are requested by legislation. Water cities, in particular, must take into account boats and ships apportion. The general concern for the impact of air pollutant emissions on the environment has led to the introduction of numerous regulations targeting land based emission sources. In contrast, marine and inland water emissions from ships and small boats have largely been exempt from this development. Over the past decades, however, the air emissions from shipping have been the subject of increasing attention. Research and development efforts have focused on characterizing the problem at hand and offering suitable abatement solutions recently requested by new regulations. Despite this, some specific scenarios could not easily be considered because of their peculiarity. Venice, as a water town in its historical part, is a very distinctive case where transport is supplied by marine systems. Moreover, it is sited in a protected lagoon that represents a very delicate ecosystem. In relation to waterborne transport, the Venice Public Transport Company (ACTV) has been suggested to adopt electrical engines for the abatement of the main pollutants, however, Venice peculiarity forces another hybrid solution. Moreover, changing completely the ACTV fleet requires high costs not completely justified by the emission quantification. A real estimate of the maintenance costs and disposal must be evaluated for both the traditional vessel and the hybrid one. In order to better investigate on the impact of these vehicles, ACTV in collaboration with Ca’ Foscari University, has developed an emission factor model: Water Bus Emission factor Model (WATERBUS). This model permit to better quantify actual and future emission scenarios, helping in decision making. In my talk I will describe the debate between environmental and economic sustainability in this peculiar and protected scenario.
Dipartimento di Scienze Ambientali, Informatica e Statistica - Eliana Pecorari